12271560 has 96 divisors (see below), whose sum is σ = 42845760. Its totient is φ = 2803584.

The previous prime is 12271541. The next prime is 12271561. The reversal of 12271560 is 6517221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12271560.

It is not an unprimeable number, because it can be changed into a prime (12271561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4837 + ... + 6923.

It is an arithmetic number, because the mean of its divisors is an integer number (446310).

Almost surely, 2^12271560 is an apocalyptic number.

12271560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12271560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21422880).

12271560 is an abundant number, since it is smaller than the sum of its proper divisors (30574200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12271560 is a wasteful number, since it uses less digits than its factorization.

12271560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115 (or 2104 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 12271560 is about 3503.0786459913. The cubic root of 12271560 is about 230.6569748045.

Adding to 12271560 its reverse (6517221), we get a palindrome (18788781).

The spelling of 12271560 in words is "twelve million, two hundred seventy-one thousand, five hundred sixty".